On Wed 12-06-19 15:13:36, Ira Weiny wrote:
> On Wed, Jun 12, 2019 at 04:14:21PM -0300, Jason Gunthorpe wrote:
> > On Wed, Jun 12, 2019 at 02:09:07PM +0200, Jan Kara wrote:
> > > On Wed 12-06-19 08:47:21, Jason Gunthorpe wrote:
> > > > On Wed, Jun 12, 2019 at 12:29:17PM +0200, Jan Kara wrote:
> > >
On Wed 12-06-19 11:49:52, Dan Williams wrote:
> On Wed, Jun 12, 2019 at 3:29 AM Jan Kara wrote:
> >
> > On Fri 07-06-19 07:52:13, Ira Weiny wrote:
> > > On Fri, Jun 07, 2019 at 09:17:29AM -0300, Jason Gunthorpe wrote:
> > > > On Fri, Jun 07, 2019 at 12:36:36PM +0200, Jan Kara wrote:
> > > >
> > >
The only user of it has just been removed, and there wasn't really any need
to wrap a basic memory allocator to start with.
Signed-off-by: Christoph Hellwig
---
include/linux/hmm.h | 3 ---
mm/hmm.c| 14 --
2 files changed, 17 deletions(-)
diff --git
noveau is currently using this through an odd hmm wrapper, and I plan
to switch it to the real thing later in this series.
Signed-off-by: Christoph Hellwig
---
mm/mempolicy.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 01600d80ae01..f9023b5fba37
Passing the actual typed structure leads to more understandable code
vs the actual references.
Signed-off-by: Christoph Hellwig
---
drivers/dax/device.c | 7 +++
drivers/nvdimm/pmem.c | 6 +++---
drivers/pci/p2pdma.c | 6 +++---
include/linux/memremap.h
This function has never been used since it was first added to the kernel
more than a year and a half ago, and if we ever grow a consumer of the
MEMORY_DEVICE_PUBLIC infrastructure it can easily use devm_memremap_pages
directly now that we've simplified the API for it.
Signed-off-by: Christoph
Hi Dan, Jérôme and Jason,
below is a series that cleans up the dev_pagemap interface so that
it is more easily usable, which removes the need to wrap it in hmm
and thus allowing to kill a lot of code
Diffstat:
22 files changed, 245 insertions(+), 802 deletions(-)
Git tree:
Signed-off-by: Christoph Hellwig
---
mm/Kconfig | 10 --
1 file changed, 10 deletions(-)
diff --git a/mm/Kconfig b/mm/Kconfig
index f0c76ba47695..0d2ba7e1f43e 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -675,16 +675,6 @@ config ARCH_HAS_HMM_MIRROR
depends on (X86_64 || PPC64)
->mapping isn't even used by HMM users, and the field at the same offset
in the zone_device part of the union is declared as pad. (Which btw is
rather confusing, as DAX uses ->pgmap and ->mapping from two different
sides of the union, but DAX doesn't use hmm_devmem_free).
Signed-off-by:
This code is a trivial wrapper around device model helpers, which
should have been integrated into the driver device model usage from
the start. Assuming it actually had users, which it never had since
the code was added more than 1 1/2 years ago.
Signed-off-by: Christoph Hellwig
---
On Thu, Jun 13, 2019 at 02:36:49PM +1000, Dave Chinner wrote:
> On Wed, Jun 12, 2019 at 08:23:20PM -0700, Matthew Wilcox wrote:
> > On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> > > On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > > > That's rather different
There isn't really much value add in the hmm_devmem_add wrapper. Just
factor out a little helper to find the resource, and otherwise let the
driver implement the dev_pagemap_ops directly.
Signed-off-by: Christoph Hellwig
---
Documentation/vm/hmm.rst | 26
include/linux/hmm.h |
The code hasn't been used since it was added to the tree, and doesn't
appear to actually be usable. Mark it as BROKEN until either a user
comes along or we finally give up on it.
Signed-off-by: Christoph Hellwig
---
mm/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/Kconfig
All the mm/hmm.c code is better keyed off HMM_MIRROR. Also let nouveau
depend on it instead of the mix of a dummy dependency symbol plus the
actually selected one. Drop various odd dependencies, as the code is
pretty portable.
Signed-off-by: Christoph Hellwig
---
The functionality is identical to the one currently open coded in
device-dax.
Signed-off-by: Christoph Hellwig
---
drivers/dax/dax-private.h | 4 ---
drivers/dax/device.c | 52 +--
2 files changed, 1 insertion(+), 55 deletions(-)
diff --git
struct dev_pagemap is always embedded into a containing structure, so
there is no need to an additional private data field.
Signed-off-by: Christoph Hellwig
---
drivers/nvdimm/pmem.c| 2 +-
include/linux/memremap.h | 3 +--
kernel/memremap.c| 2 +-
mm/hmm.c | 9
This replaces the hacky ->fault callback, which is currently directly
called from common code through a hmm specific data structure as an
exercise in layering violations.
Signed-off-by: Christoph Hellwig
---
include/linux/hmm.h | 6 --
include/linux/memremap.h | 6 ++
Keep the physical address allocation that hmm_add_device does with the
rest of the resource code, and allow future reuse of it without the hmm
wrapper.
Signed-off-by: Christoph Hellwig
---
include/linux/ioport.h | 2 ++
kernel/resource.c | 39 +++
The dev_pagemap is a growing too many callbacks. Move them into a
separate ops structure so that they are not duplicated for multiple
instances, and an attacker can't easily overwrite them.
Signed-off-by: Christoph Hellwig
---
drivers/dax/device.c | 6 +-
The ZONE_DEVICE support doesn't depend on anything HMM related, just on
various bits of arch support as indicated by the architecture. Also
don't select the option from nouveau as it isn't present in many setups,
and depend on it instead.
Signed-off-by: Christoph Hellwig
---
Provide an internal refcounting logic if no ->ref field is provided
in the pagemap passed into devm_memremap_pages so that callers don't
have to reinvent it poorly.
Signed-off-by: Christoph Hellwig
---
include/linux/memremap.h | 4 +++
kernel/memremap.c | 60
Just use devm_memremap_pages instead of hmm_devmem_add pages to allow
killing that wrapper which doesn't provide a whole lot of benefits.
Signed-off-by: Christoph Hellwig
---
drivers/gpu/drm/nouveau/nouveau_dmem.c | 80 --
1 file changed, 38 insertions(+), 42
Just check if there is a ->page_free operation set and take care of the
static key enable, as well as the put using device managed resources.
Signed-off-by: Christoph Hellwig
---
drivers/nvdimm/pmem.c | 23 +++--
include/linux/mm.h| 10
kernel/memremap.c | 59
Remove the clumsy hmm_devmem_page_{get,set}_drvdata helpers, and
instead just access the page directly. Also make the page data
a void pointer, and thus much easier to use.
Signed-off-by: Christoph Hellwig
---
drivers/gpu/drm/nouveau/nouveau_dmem.c | 18 +++--
include/linux/hmm.h
hmm_vma_alloc_locked_page is scheduled to go away, use the proper
mm function directly.
Signed-off-by: Christoph Hellwig
---
drivers/gpu/drm/nouveau/nouveau_dmem.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c
The migrate_vma helper is only used by noveau to migrate device private
pages around. Other HMM_MIRROR users like amdgpu or infiniband don't
need it.
Signed-off-by: Christoph Hellwig
---
drivers/gpu/drm/nouveau/Kconfig | 1 +
mm/Kconfig | 1 -
2 files changed, 1
On Thu, Jun 13, 2019 at 11:43:03AM +0200, Christoph Hellwig wrote:
> Hi Dan, Jérôme and Jason,
>
> below is a series that cleans up the dev_pagemap interface so that
> it is more easily usable, which removes the need to wrap it in hmm
> and thus allowing to kill a lot of code
Do you want some of
On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> e.g. Process A has an exclusive layout lease on file F. It does an
> IO to file F. The filesystem IO path checks that Process A owns the
> lease on the file and so skips straight through layout breaking
> because it owns the lease and
On Thu, Jun 13, 2019 at 11:43:09AM +0200, Christoph Hellwig wrote:
> Keep the physical address allocation that hmm_add_device does with the
> rest of the resource code, and allow future reuse of it without the hmm
> wrapper.
>
> Signed-off-by: Christoph Hellwig
> include/linux/ioport.h | 2 ++
On Thu, Jun 13, 2019 at 11:43:11AM +0200, Christoph Hellwig wrote:
> Passing the actual typed structure leads to more understandable code
> vs the actual references.
>
> Signed-off-by: Christoph Hellwig
> drivers/dax/device.c | 7 +++
> drivers/nvdimm/pmem.c | 6
On Thu, Jun 13, 2019 at 11:43:23AM +0200, Christoph Hellwig wrote:
> The ZONE_DEVICE support doesn't depend on anything HMM related, just on
> various bits of arch support as indicated by the architecture. Also
> don't select the option from nouveau as it isn't present in many setups,
> and
On Thu, Jun 13, 2019 at 1:12 PM Logan Gunthorpe wrote:
>
>
>
> On 2019-06-13 3:43 a.m., Christoph Hellwig wrote:
> > Passing the actual typed structure leads to more understandable code
> > vs the actual references.
>
> Ha, ok, I originally suggested this to Dan when he introduced the
>
On 2019-06-13 2:21 p.m., Dan Williams wrote:
> On Thu, Jun 13, 2019 at 1:18 PM Logan Gunthorpe wrote:
>>
>>
>>
>> On 2019-06-13 12:27 p.m., Dan Williams wrote:
>>> On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
Hi Dan, Jérôme and Jason,
below is a series that
On Thu, Jun 13, 2019 at 11:43:12AM +0200, Christoph Hellwig wrote:
> Just check if there is a ->page_free operation set and take care of the
> static key enable, as well as the put using device managed resources.
> diff --git a/mm/hmm.c b/mm/hmm.c
> index c76a1b5defda..6dc769feb2e1 100644
> +++
On Thu, Jun 13, 2019 at 12:53:02PM -0700, Ralph Campbell wrote:
>
> On 6/13/19 12:44 PM, Jason Gunthorpe wrote:
> > On Thu, Jun 13, 2019 at 11:43:21AM +0200, Christoph Hellwig wrote:
> > > The code hasn't been used since it was added to the tree, and doesn't
> > > appear to actually be usable.
On Thu, Jun 13, 2019 at 11:43:25AM +0200, Christoph Hellwig wrote:
> The migrate_vma helper is only used by noveau to migrate device private
> pages around. Other HMM_MIRROR users like amdgpu or infiniband don't
> need it.
>
> Signed-off-by: Christoph Hellwig
> ---
>
On Thu, Jun 13, 2019 at 08:40:46PM +, Jason Gunthorpe wrote:
> > Perhaps we should pull those out and resend them through hmm.git?
>
> It could be done - but how bad is the conflict resolution?
Trivial. All but one patch just apply using git-am, and the other one
just has a few lines of
On Thu, Jun 13, 2019 at 11:43:21AM +0200, Christoph Hellwig wrote:
> The code hasn't been used since it was added to the tree, and doesn't
> appear to actually be usable. Mark it as BROKEN until either a user
> comes along or we finally give up on it.
>
> Signed-off-by: Christoph Hellwig
>
On Thu, Jun 13, 2019 at 12:35 PM Jason Gunthorpe wrote:
>
> On Thu, Jun 13, 2019 at 11:43:12AM +0200, Christoph Hellwig wrote:
> > Just check if there is a ->page_free operation set and take care of the
> > static key enable, as well as the put using device managed resources.
> > diff --git
On 2019-06-13 3:43 a.m., Christoph Hellwig wrote:
> The dev_pagemap is a growing too many callbacks. Move them into a
> separate ops structure so that they are not duplicated for multiple
> instances, and an attacker can't easily overwrite them.
>
> Signed-off-by: Christoph Hellwig
> ---
>
On Thu, Jun 13, 2019 at 1:18 PM Logan Gunthorpe wrote:
>
>
>
> On 2019-06-13 12:27 p.m., Dan Williams wrote:
> > On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
> >>
> >> Hi Dan, Jérôme and Jason,
> >>
> >> below is a series that cleans up the dev_pagemap interface so that
> >> it is
On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> > > On Fri, Jun 07, 2019 at 11:25:35AM -0700, Ira Weiny wrote:
> > > > Are you suggesting that we have
On Thu, Jun 13, 2019 at 10:55:52AM +1000, Dave Chinner wrote:
> On Wed, Jun 12, 2019 at 04:30:24PM -0700, Ira Weiny wrote:
> > On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > > On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> > > > On Fri, Jun 07, 2019 at
On Thu, Jun 13, 2019 at 11:43:20AM +0200, Christoph Hellwig wrote:
> There isn't really much value add in the hmm_devmem_add wrapper. Just
> factor out a little helper to find the resource, and otherwise let the
> driver implement the dev_pagemap_ops directly.
Was this commit message written
On 6/13/19 12:44 PM, Jason Gunthorpe wrote:
On Thu, Jun 13, 2019 at 11:43:21AM +0200, Christoph Hellwig wrote:
The code hasn't been used since it was added to the tree, and doesn't
appear to actually be usable. Mark it as BROKEN until either a user
comes along or we finally give up on it.
On Thu, Jun 13, 2019 at 11:43:24AM +0200, Christoph Hellwig wrote:
> All the mm/hmm.c code is better keyed off HMM_MIRROR. Also let nouveau
> depend on it instead of the mix of a dummy dependency symbol plus the
> actually selected one. Drop various odd dependencies, as the code is
> pretty
On 2019-06-13 3:43 a.m., Christoph Hellwig wrote:
> Passing the actual typed structure leads to more understandable code
> vs the actual references.
Ha, ok, I originally suggested this to Dan when he introduced the
callback[1].
Reviewed-by: Logan Gunthorpe
Logan
[1]
On 2019-06-13 12:27 p.m., Dan Williams wrote:
> On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
>>
>> Hi Dan, Jérôme and Jason,
>>
>> below is a series that cleans up the dev_pagemap interface so that
>> it is more easily usable, which removes the need to wrap it in hmm
>> and thus
On Thu, Jun 13, 2019 at 11:27:39AM -0700, Dan Williams wrote:
> On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
> >
> > Hi Dan, Jérôme and Jason,
> >
> > below is a series that cleans up the dev_pagemap interface so that
> > it is more easily usable, which removes the need to wrap it in
On Thu, Jun 13, 2019 at 08:27:55AM -0700, Matthew Wilcox wrote:
> On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> > e.g. Process A has an exclusive layout lease on file F. It does an
> > IO to file F. The filesystem IO path checks that Process A owns the
> > lease on the file and
On Thu, Jun 13, 2019 at 11:43:10AM +0200, Christoph Hellwig wrote:
> The dev_pagemap is a growing too many callbacks. Move them into a
> separate ops structure so that they are not duplicated for multiple
> instances, and an attacker can't easily overwrite them.
Reviewed-by: Jason Gunthorpe
On Thu, Jun 13, 2019 at 11:43:17AM +0200, Christoph Hellwig wrote:
> hmm_vma_alloc_locked_page is scheduled to go away, use the proper
> mm function directly.
>
> Signed-off-by: Christoph Hellwig
> ---
> drivers/gpu/drm/nouveau/nouveau_dmem.c | 3 ++-
> 1 file changed, 2 insertions(+), 1
On Thu, Jun 13, 2019 at 8:14 AM Jason Gunthorpe wrote:
>
> On Wed, Jun 12, 2019 at 06:14:46PM -0700, Dan Williams wrote:
> > > Effectively, we would need a way for an admin to close a specific file
> > > descriptor (or set of fds) which point to that file. AFAIK there is no
> > > way to
> > >
On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
>
> Hi Dan, Jérôme and Jason,
>
> below is a series that cleans up the dev_pagemap interface so that
> it is more easily usable, which removes the need to wrap it in hmm
> and thus allowing to kill a lot of code
>
> Diffstat:
>
> 22 files
On Thu, Jun 13, 2019 at 11:43:05AM +0200, Christoph Hellwig wrote:
> This code is a trivial wrapper around device model helpers, which
> should have been integrated into the driver device model usage from
> the start. Assuming it actually had users, which it never had since
> the code was added
On Thu, Jun 13, 2019 at 11:43:06AM +0200, Christoph Hellwig wrote:
> This function has never been used since it was first added to the kernel
> more than a year and a half ago, and if we ever grow a consumer of the
> MEMORY_DEVICE_PUBLIC infrastructure it can easily use devm_memremap_pages
>
On Thu, Jun 13, 2019 at 11:43:04AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig
> ---
> mm/Kconfig | 10 --
> 1 file changed, 10 deletions(-)
So long as we are willing to run a hmm.git we can merge only complete
features going forward.
Thus we don't need the crazy
On Thu, Jun 13, 2019 at 11:43:07AM +0200, Christoph Hellwig wrote:
> ->mapping isn't even used by HMM users, and the field at the same offset
> in the zone_device part of the union is declared as pad. (Which btw is
> rather confusing, as DAX uses ->pgmap and ->mapping from two different
> sides
On Wed, Jun 12, 2019 at 4:32 PM Ira Weiny wrote:
>
> On Wed, Jun 12, 2019 at 03:54:19PM -0700, Dan Williams wrote:
> > On Wed, Jun 12, 2019 at 3:12 PM Ira Weiny wrote:
> > >
> > > On Wed, Jun 12, 2019 at 04:14:21PM -0300, Jason Gunthorpe wrote:
> > > > On Wed, Jun 12, 2019 at 02:09:07PM +0200,
On 6/13/19 2:43 AM, Christoph Hellwig wrote:
> This code is a trivial wrapper around device model helpers, which
> should have been integrated into the driver device model usage from
> the start. Assuming it actually had users, which it never had since
> the code was added more than 1 1/2 years
On 6/13/19 2:43 AM, Christoph Hellwig wrote:
> ->mapping isn't even used by HMM users, and the field at the same offset
> in the zone_device part of the union is declared as pad. (Which btw is
> rather confusing, as DAX uses ->pgmap and ->mapping from two different
> sides of the union, but DAX
On 6/13/19 2:43 AM, Christoph Hellwig wrote:
> noveau is currently using this through an odd hmm wrapper, and I plan
"nouveau"
> to switch it to the real thing later in this series.
>
> Signed-off-by: Christoph Hellwig
> ---
Reviewed-by: John Hubbard
thanks,
--
John Hubbard
NVIDIA
>
On Fri, Jun 14, 2019 at 12:09:21PM +1000, Dave Chinner wrote:
> On Thu, Jun 13, 2019 at 08:45:30PM -0300, Jason Gunthorpe wrote:
> > On Thu, Jun 13, 2019 at 02:13:21PM -0700, Ira Weiny wrote:
> > > On Thu, Jun 13, 2019 at 08:27:55AM -0700, Matthew Wilcox wrote:
> > > > On Thu, Jun 13, 2019 at
On Thu, Jun 13, 2019 at 01:34:05PM -0700, Ira Weiny wrote:
> On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> > On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > > On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> > > > On Fri, Jun 07, 2019 at
On 6/13/19 2:43 AM, Christoph Hellwig wrote:
This replaces the hacky ->fault callback, which is currently directly
called from common code through a hmm specific data structure as an
exercise in layering violations.
Signed-off-by: Christoph Hellwig
---
include/linux/hmm.h | 6 --
On Thu, Jun 13, 2019 at 08:40:46PM +, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 11:27:39AM -0700, Dan Williams wrote:
> > On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
> > >
> > > Hi Dan, Jérôme and Jason,
> > >
> > > below is a series that cleans up the dev_pagemap
On 6/13/19 5:43 PM, Ira Weiny wrote:
> On Thu, Jun 13, 2019 at 07:58:29PM +, Jason Gunthorpe wrote:
>> On Thu, Jun 13, 2019 at 12:53:02PM -0700, Ralph Campbell wrote:
>>>
...
>> Hum, so the only thing this config does is short circuit here:
>>
>> static inline bool is_device_public_page(const
On 6/13/19 2:43 AM, Christoph Hellwig wrote:
> The migrate_vma helper is only used by noveau to migrate device private
> pages around. Other HMM_MIRROR users like amdgpu or infiniband don't
> need it.
>
> Signed-off-by: Christoph Hellwig
> ---
> drivers/gpu/drm/nouveau/Kconfig | 1 +
>
On Wed 12-06-19 11:41:53, Dan Williams wrote:
> On Wed, Jun 12, 2019 at 5:09 AM Jan Kara wrote:
> >
> > On Wed 12-06-19 08:47:21, Jason Gunthorpe wrote:
> > > On Wed, Jun 12, 2019 at 12:29:17PM +0200, Jan Kara wrote:
> > >
> > > > > > The main objection to the current ODP & DAX solution is that
On Thu, Jun 13, 2019 at 01:34:06PM -0700, Ira Weiny wrote:
> On Thu, Jun 13, 2019 at 10:55:52AM +1000, Dave Chinner wrote:
> > On Wed, Jun 12, 2019 at 04:30:24PM -0700, Ira Weiny wrote:
> > > On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > > > On Sat, Jun 08, 2019 at 10:10:36AM
On Thu, Jun 13, 2019 at 11:21:01PM +0200, Christoph Hellwig wrote:
> On Thu, Jun 13, 2019 at 08:40:46PM +, Jason Gunthorpe wrote:
> > > Perhaps we should pull those out and resend them through hmm.git?
> >
> > It could be done - but how bad is the conflict resolution?
>
> Trivial. All but
Thanks Dan for the reply!
On 6/14/19, 3:06 AM, "Dan Williams" wrote:
On Wed, Jun 12, 2019 at 9:08 PM Yue Li wrote:
>
> hi Dan and Steve,
>
>
Hi,
I just happened to see this by luck, please use my Intel address, and
copy the libnvdimm mailing list on
On Thu, Jun 13, 2019 at 08:45:30PM -0300, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 02:13:21PM -0700, Ira Weiny wrote:
> > On Thu, Jun 13, 2019 at 08:27:55AM -0700, Matthew Wilcox wrote:
> > > On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> > > > e.g. Process A has an
On Thu, Jun 13, 2019 at 11:43:16AM +0200, Christoph Hellwig wrote:
> The functionality is identical to the one currently open coded in
> device-dax.
>
> Signed-off-by: Christoph Hellwig
> ---
> drivers/dax/dax-private.h | 4 ---
> drivers/dax/device.c | 52
On Thu, Jun 13, 2019 at 07:58:29PM +, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 12:53:02PM -0700, Ralph Campbell wrote:
> >
> > On 6/13/19 12:44 PM, Jason Gunthorpe wrote:
> > > On Thu, Jun 13, 2019 at 11:43:21AM +0200, Christoph Hellwig wrote:
> > > > The code hasn't been used since
On 6/13/19 2:43 AM, Christoph Hellwig wrote:
> This function has never been used since it was first added to the kernel
> more than a year and a half ago, and if we ever grow a consumer of the
> MEMORY_DEVICE_PUBLIC infrastructure it can easily use devm_memremap_pages
> directly now that we've
On Thu, Jun 13, 2019 at 08:45:30PM -0300, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 02:13:21PM -0700, Ira Weiny wrote:
> > On Thu, Jun 13, 2019 at 08:27:55AM -0700, Matthew Wilcox wrote:
> > > On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> > > > e.g. Process A has an
On Thu, Jun 13, 2019 at 07:31:07PM -0700, Matthew Wilcox wrote:
> On Fri, Jun 14, 2019 at 12:09:21PM +1000, Dave Chinner wrote:
> > If the lease holder modifies the mapping in a way that causes it's
> > own internal state to screw up, then that's a bug in the lease
> > holder application.
>
>
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